20121263150542 has 8 divisors (see below), whose sum is σ = 30202695484632. Its totient is φ = 10053697989000.

The previous prime is 20121263150507. The next prime is 20121263150683. The reversal of 20121263150542 is 24505136212102.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 20121263150498 and 20121263150507.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3466789509 + ... + 3466795312.

It is an arithmetic number, because the mean of its divisors is an integer number (3775336935579).

Almost surely, 2^{20121263150542} is an apocalyptic number.

20121263150542 is a deficient number, since it is larger than the sum of its proper divisors (10081432334090).

20121263150542 is a wasteful number, since it uses less digits than its factorization.

20121263150542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6933586274.

The product of its (nonzero) digits is 28800, while the sum is 34.

Adding to 20121263150542 its reverse (24505136212102), we get a palindrome (44626399362644).

The spelling of 20121263150542 in words is "twenty trillion, one hundred twenty-one billion, two hundred sixty-three million, one hundred fifty thousand, five hundred forty-two".